| 摘要 |
Cohesive carbon assemblies are prepared by obtaining a carbon starting material in the form of powder, particles, flakes, or loose agglomerates, dispersing the carbon in a selected organic solvent by mechanical mixing and/or sonication, and substantially removing the organic solvent, typically by evaporation, whereby the cohesive assembly of carbon is formed. The method is suitable for preparing free-standing, monolithic assemblies of carbon nanotubes in the form of films, wafers, or discs, having high carbon packing density and low electrical resistivity. The method is suitable for preparing adherent cohesive carbon assemblies on substrates comprising various materials. The assemblies have various potential applications, such as electrodes or current collectors in electrochemical capacitors, fuel cells, and batteries, or as electromagnetic interference shielding materials. |
| 主权项 |
1. A method of preparing a cohesive carbon assembly comprising:
(a) obtaining a carbon starting material in the form of powder, particles, flakes, or loose agglomerates, (b) dispersing the carbon starting material in an organic solvent comprising toluene, o-dichlorobenzene (ODCB), isopropyl alcohol (IPA), N,N-dimethylformamide (DMF), benzene, chlorobenzene, m-dichlorobenzene, 1,2,4-trichlorobenzene, bromobenzene, m-dibromobenzene, o-dibromobenzene, o-xylene, m-xylene, p-xylene, 1,2-dichloroethane, 1,2-dibromoethane, chloroform, formamide, N-methylformamide, N-vinylformamide, N-(phenethyl)formamide, N,N-diethylformamide, N,N-bis(1-methylethyl)formamide, dimethyl sulfoxide, or any combination thereof, in a prescribed ratio to form a dispersion, (c) applying the dispersion to a hydrophobic surface, and (d) substantially removing the organic solvent in a controlled manner to form a cohesive carbon assembly on the hydrophobic surface, wherein the hydrophobic surface comprises a dimethyl organosilane, a fluorinated dimethyl organosilane, a fluorinated polymer, or Teflon. |
